TABLE 3. Fit Parameters for Temperature Dependence of 1/T1.
| structure | solvent | directa | Ramanb | local modec |
|---|---|---|---|---|
| 1a (tetra) | 4:1 toluene/CHCl3 | 37 | 184 × 104 | |
| 1b (di) | 4:1 toluene/CHCl3 | 0.88 | 14 × 104 | |
| 2a (di) | 4:1 toluene/CHCl3 | 0.2 | 3.1 × 104 | |
| 2b (di) | 4:1 toluene/CHCl3 | 0.33 | 4.6 × 104 | |
| 3 | 4:1 toluene/CHCl3 | d | 5.7 × 104 | |
| 1c (mono) | 4:1 toluene/CHCl3 | 0.02 | 2.4 × 104 | |
| 2a_mono | 4:1 toluene/CHCl3 | 0.02 | 1.5 × 104 | |
| 3_mono | 4:1 toluene/CHCl3 | d | 5.4 × 104 | |
| 1b (di) | sucrose octaacetate | e | 41 × 104 | |
| 2a (di) | sucrose octaacetate | e | 6.5 × 104 | 15 × 106 |
| 2b (di) | sucrose octaacetate | e | 21 × 104 | 14 × 106 |
| 3 | sucrose octaacetate | e | 13 × 104 | 2.8 × 106 |
| 2a_mono | sucrose octaacetate | e | 3.2 × 104 | 0.64 × 106 |
| 3_mono | sucrose octaacetate | e | 12 × 104 | 2.8 × 106 |
| 2a (di) | glycerol | <0.02 | 1.5 × 104 | 13 × 106 |
a
Direct process from dipolar interaction; 1/T1 )a(T + 270).
b
Raman process with Debye temperature fixed at 100 K.
c
Local mode with a fixed vibration energy of 950 K.
d
SR data were recorded only above 25 K.
e
SR data in sucrose octaacetate were recorded primarily at temperatures where the contribution from the direct process was not significant.